Layered Graphene/Quantum Dots for Photovoltaic Devices

Guo, Chunxian; Yang, Hong Bin; Sheng, Zhao Min; Lu, Zhi Song; Song, Qun; Li, Chang Ming

doi:10.1002/anie.200906291

Cited by 640 publications

(144 citation statements)

References 33 publications

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“…Hybrid materials based on inorganic nanoparticles and graphene or its hydrophilic derivative, graphene oxide (GO), have been shown to significantly boost the functional performance in a wide range of applications, [3] such as heterogeneous, [4] electro- [5] and photo-catalysis, [6] energy storage, [7] CO2 adsorption, [8] and sensing. [9] This study focuses on the utilization of GO as support for two-dimensional functional nanoparticles, specifically for mixed metal oxides (MMOs) that are produced from twodimensional layered double hydroxide (LDH) nanoparticles. GO is expected to be particularly efficient as a support for LDH-derived MMOs due to the matching 2D geometry and the charge complementarity of the initial (positively-charged) LDH nanoplatelets and the exfoliated (negatively-charged) GO sheets.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide/mixed metal oxide hybrid materials for enhanced adsorption desulfurization of liquid hydrocarbon fuels

Menzel

Iruretagoyena

Wang

et al. 2016

Fuel

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HIGHLIGHTS The adsorption of sulfur from liquid hydrocarbons using mixed metal oxides unsupported and supported on graphene oxide was studied for the first time  Sulfur adsorption capacity and thermal stability of mixed metal oxides is enhanced by the presence of graphene oxide  The GO supported adsorbents show good selectivity for organosulfur compounds over sulfur-free aromatic hydrocarbons KEYWORDSGraphene oxide, mixed metal oxide, dibenzothiophene, adsorption, desulfurization ABSTRACTA series of mixed metal oxides (MMOs) adsorbents (MgAl-, CuAl-and CoAl-MMOs) were supported on graphene oxide (GO) through in-situ precipitation of layered double hydroxides (LDHs) onto exfoliated GO, followed by thermal conversion. The study shows that GO is an excellent support for the LDH-derived MMOs due to matching geometry and charge complementarity, resulting in a strong hybrid effect, evidenced by significantly enhanced adsorption performance for the commercially important removal of heavy thiophenic compounds from hydrocarbons. Fundamental liquid-phase adsorption characteristics of the MMO/GO hybrids are quantified in terms of adsorption equilibrium isotherms, selectivity and adsorbent regenerability. Upon incorporation of as little as 5wt% GO into the MMO material, the organosulfur uptake was increased by up to 170%, the recycling stability was markedly improved and pronounced selectivity for thiophenic organosulfurs over sulfur-free aromatic hydrocarbons was observed.2

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Section: Introductionmentioning

confidence: 99%

Graphene oxide/mixed metal oxide hybrid materials for enhanced adsorption desulfurization of liquid hydrocarbon fuels

Menzel

Iruretagoyena

Wang

et al. 2016

Fuel

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“…Owing to their remarkable high electron mobility (15,000 cm 2 /V·s) [8], extremely large surface area (~2600 m 2 /g) [9], and low fabrication cost, GNs are considered as an ideal support for developing next-generation photovoltaic devices [10]. Li et al reported that on forming layered GNs-CdS quantum dots (QDs), the electrode exhibited a significant improvement in photo-response compared with that of single-walled carbon nanotube-CdS QD nanocomposites [11].…”

Section: Introductionmentioning

confidence: 99%

One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

et al. 2010

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The synthesis of graphene-semiconductor nanocomposites has attracted increasing attention due to their interesting optoelectronic properties. However the synthesis of such nanocomposites, with decorated particles well dispersed on graphene, is still a great challenge. This work reports a facile, one-step, solvothermal method for the synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites directly from graphene oxide, with CdS and ZnS very well dispersed on the graphene nanosheets. Photoluminescence measurements showed that the integration of CdS and ZnS with graphene significantly decreases their photoluminescence. Transient photovoltage studies revealed that the graphene-CdS nanocomposite exhibits a very unexpected strong positive photovoltaic response, while separate samples of graphene and CdS quantum dots (QDs) of a similar size do not show any photovoltaic response.

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“…TiO 2 with a size of about 7 nm fully cover both surfaces of the graphene nanosheets. The growth of TiO 2 on the surface of GO plays an important role in enhancing photocurrent response [77] and, thus, improving the photocatalytic ability. Li and coworkers [78] synthesized CdS cluster-decorated graphene nanosheets via a solvothermal method (Figure 7).…”

Section: D/0dmentioning

confidence: 99%

Nanocarbons with Different Dimensions as Noble-Metal-Free Co-Catalysts for Photocatalysts

Shen

et al. 2016

Catalysts

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Abstract:In this review, we provide an overview of recent progress in nanocarbons with different dimensions as noble-metal-free co-catalysts for photocatalysts. We put emphasis on the interface engineering between nanocarbon co-catalysts and various semiconductor photocatalysts and the novel properties generating of nanocarbon co-catalysts, also including the synthesis and application of nanocarbon-based photocatalyst composites.

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Layered Graphene/Quantum Dots for Photovoltaic Devices

Cited by 640 publications

References 33 publications

Graphene oxide/mixed metal oxide hybrid materials for enhanced adsorption desulfurization of liquid hydrocarbon fuels

Graphene oxide/mixed metal oxide hybrid materials for enhanced adsorption desulfurization of liquid hydrocarbon fuels

One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

Nanocarbons with Different Dimensions as Noble-Metal-Free Co-Catalysts for Photocatalysts

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